function.stream-socket-enable-crypto.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Turns encryption on/off on an already connected socket</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.stream-socket-client.html">stream_socket_client</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.stream-socket-get-name.html">stream_socket_get_name</a></div> <div class="up"><a href="ref.stream.html">Stream Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.stream-socket-enable-crypto" class="refentry"> <div class="refnamediv"> <h1 class="refname">stream_socket_enable_crypto</h1> <p class="verinfo">(PHP 5 >= 5.1.0)</p><p class="refpurpose"><span class="refname">stream_socket_enable_crypto</span> — <span class="dc-title">Turns encryption on/off on an already connected socket</span></p> </div> <div class="refsect1 unknown"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><b><b>stream_socket_enable_crypto</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$stream</tt></span> , <span class="methodparam"><span class="type">bool</span> <tt class="parameter">$enable</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$crypto_type</tt></span> [, <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$session_stream</tt></span> ]] )</div> <p class="simpara"> When called with the <i><tt class="parameter">crypto_type</tt></i> parameter, <b>stream_socket_enable_crypto()</b> will setup encryption on the stream using the specified method. </p> <p class="para"> Valid values for <i><tt class="parameter">crypto_type</tt></i> <ul class="itemizedlist"> <li class="listitem"><span class="simpara"><b><tt>STREAM_CRYPTO_METHOD_SSLv2_CLIENT</tt></b></span></li> <li class="listitem"><span class="simpara"><b><tt>STREAM_CRYPTO_METHOD_SSLv3_CLIENT</tt></b></span></li> <li class="listitem"><span class="simpara"><b><tt>STREAM_CRYPTO_METHOD_SSLv23_CLIENT</tt></b></span></li> <li class="listitem"><span class="simpara"><b><tt>STREAM_CRYPTO_METHOD_TLS_CLIENT</tt></b></span></li> <li class="listitem"><span class="simpara"><b><tt>STREAM_CRYPTO_METHOD_SSLv2_SERVER</tt></b></span></li> <li class="listitem"><span class="simpara"><b><tt>STREAM_CRYPTO_METHOD_SSLv3_SERVER</tt></b></span></li> <li class="listitem"><span class="simpara"><b><tt>STREAM_CRYPTO_METHOD_SSLv23_SERVER</tt></b></span></li> <li class="listitem"><span class="simpara"><b><tt>STREAM_CRYPTO_METHOD_TLS_SERVER</tt></b></span></li> </ul> </p> <p class="simpara"> Once the crypto settings are established, cryptography can be turned on and off dynamically by passing <b><tt>TRUE</tt></b> or <b><tt>FALSE</tt></b> in the <i><tt class="parameter">enable</tt></i> parameter. </p> <p class="simpara"> If this stream should be seeded with settings from an already established crypto enabled stream, pass that stream's resource variable in the fourth parameter. </p> <p class="simpara"> Returns <b><tt>TRUE</tt></b> on success, <b><tt>FALSE</tt></b> if negotiation has failed or <i>0</i> if there isn't enough data and you should try again (only for non-blocking sockets). </p> <div class="example"> <p><b>Example #1 <b>stream_socket_enable_crypto()</b> Example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">stream_socket_client</span><span style="color: #007700">(</span><span style="color: #DD0000">"tcp://myproto.example.com:31337"</span><span style="color: #007700">, </span><span style="color: #0000BB">$errno</span><span style="color: #007700">, </span><span style="color: #0000BB">$errstr</span><span style="color: #007700">, </span><span style="color: #0000BB">30</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$fp</span><span style="color: #007700">) {<br /> die(</span><span style="color: #DD0000">"Unable to connect: $errstr ($errno)"</span><span style="color: #007700">);<br />}<br /></span><span style="color: #FF8000">/* Turn on encryption for login phase */<br /></span><span style="color: #0000BB">stream_socket_enable_crypto</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">, </span><span style="color: #0000BB">STREAM_CRYPTO_METHOD_SSLv23_CLIENT</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fwrite</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #DD0000">"USER god\r\n"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fwrite</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #DD0000">"PASS secret\r\n"</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">/* Turn off encryption for the rest */<br /></span><span style="color: #0000BB">stream_socket_enable_crypto</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #0000BB">false</span><span style="color: #007700">);<br />while (</span><span style="color: #0000BB">$motd </span><span style="color: #007700">= </span><span style="color: #0000BB">fgets</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #0000BB">$motd</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> <p class="simpara"> <a href="ref.openssl.html" class="xref">OpenSSL Functions</a>, and <a href="transports.html" class="xref">List of Supported Socket Transports</a> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.stream-socket-client.html">stream_socket_client</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.stream-socket-get-name.html">stream_socket_get_name</a></div> <div class="up"><a 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